While I do agree that its nice if we can use them for everyday things, but tracking kids and human beings is I think going too far.
Personaly if someone told me at any age that I would have a chip and me and I would be tracked, I would go find the closest fork and dig it out of me. And there could be psychological fallout from all this that we might not know about it, privacy is more than just comfort, and with kids its also about teaching them responsibility and I think tracking them at all time never stops the feeling of being babysitted, while this might be completle false, we still don’t know the problems that might be in the end.